The CrimeStopper PARK PMCU is a premium front or rear parking assist system designed for vehicles with plastic or metal bumpers that offers an audible chime as you approach an object. With 4 paintable ultrasonic sensors to alert when pulling in or backing up the system will quicken the audible alert the closer you get until finally it is a solid sound. Features longer sensor wiring for larger vehicles and front or rear parking assist |selectable|. Longer Sensor Wiring for Larger Vehicles New Smaller Sensors Suitable for Trucks SUV's and Cars Front or Rear Parking Assist (Selectable) MODEL NO - PARKPMCU